I have a Variax 600. Back years ago, when I would play, it would occasionally sound as if someone was flicking the 5 position switch between patches. I tracked it down to be the dreaded coffin shielding issue. I coated the coffin in liquid electrical tape and it stopped. I then bought a Variax 700 and had no problems. Wanting the additional magnetic pickups, I then ordered a JTV59. It has served me well since I bought it. Up until this weekend, occasionally, I would get sounds that appeared to be a loose connection in my wireless, or a bad cable. I would switch cables and it worked fine. This weekend, it was the only guitar I brought that had problems. My PRS Custom 24 worked fine with the wireless and all cables. I'm wondering if there were any issues with this model. It is a factory refurbished unit, but looked/played/sounded brand new from the beginning. I don't know off the top of my head what version of flash I'm using. I haven't hooked it up to HD Workbench in at least a year, but can check it out if it will help. Thank you in advance.